Lacquering or varnishing apparatus



Jan. 4, 1927. 1,613,235

W. MAUELER LACQUERING OR VARNISHING APPARATUS Filed July 8, 1925Patented Jan. 4, 192?.

UNITED STATES WILHELM MAUELER, OF BARIVIEN, GERMANY.

LACQUERING OR VARNISHING AFPARATUS.

Application filed July 8, 1925, Serial No. 42,176, and in Germany July28, 1924.

The subject-n'iatter of the present invention is a lacquering orvarnishing apparatus for articles en masse or in quantity and for likepurposes, which is provided with rotatable drums journalled on inclinedaxes, and the apparatus according to the present invention isdistinguished from apparatus with known drums of this kind by the drumsbeing provided with devices for gas heating instead of with the usualsteam heating devices and, for this purpose, being provided withbell-shaped jackets, open below. In this way on the one hand themanufacture and operation are considerably simplified and made lesscostly and on the other hand the apparatus is rendered employable inworks wherein there is no steam supply or in which such is not alwaysavailable. To this is added the further advantage that in consequence ofthe higher temperature obtainable by gas heating the apparatus may beused not only for drying and lacquering or varnishing but also withadvantage for blueing articles en masse, the temperature beingconveniently indicated by means of a thermometer arranged on the lid orcover. Moreover the apparatus according to the present invention isprovided with a number of further improvements by some ofwhich themanufacture and by some of which the utilization of the apparatus ismaterially facilitated.

The object of the invention is to provide a lacquering or varnishingapparatus designed for the use of gas as fuel for heating it, and whichprovides for the efiicient use of such fuel.

An embodiment of the invention is illustrated by way of example in theaccompanying drawing, wherein:

Fig. 1 is a side elevation of an apparatus with the drum tipped over forthe purpose of emptying the same,

Fig. 2 a side elevation of the apparatus in its operative position, thewalls of the base frame being shown partially broken away,

Fig. 3 a front elevation of the apparatus in its operative position,

i Fig. 4: a view of the drum and open end of the bell-shaped jacket asseen from below, and

Fig. 5 an axial section through the drum and its jacket.

Referring to the drawing, a indicates the horizontal driving shaft whichis provided in the usual manner with belt pulleys and is coupled withthe drum shaft (Z by means of a pair of bevel wheels 0. The drum f whichserves as a receptacle for the lacquering or varnishing liquid and thearticles in quantity is secured to the upper end of the drum shaft cl insuch manner as to be readily exchangeable. The drum shaft (Z is held inthe two bearings g, h which are connected together by a curved yoke scarried-by a swinging frame composed of arms m, m which are journalledon an axle 2' fast in the base or main frame 70. On one arm m isarranged a lever it provided with ,a rod 79 movable longitudinally withrespect to the same and engaging in stop notches q in an angle bracket vmounted on the outside of the base frame is. In this way the drum may onthe one hand be held in its inclined position, the operative position(Figs. 2 and 3), orv on the other hand be tipped, for the purpose ofemptying it, into a position suitable therefor (Fig. 1). Below the drumis seecured the gas burner o which comprises a curved and a straightburner pipe and said burner may be supplied with gas by means of tubingnot shown in the drawing. This burner is mounted below the drum or potand eccentrically thereto, so that the flames always burn underneath thelowermost por tions of the drum or pot body and between the same and thewall of the jacket, which burner may be secured to the swinging framearms m, so as to constantly maintain a fixed position. As a result theflames will be caused to play against the lowermost surface of the pot,thus heating the lacquer therein in the most efficient manner, while atthe same time, due to the rotation of the pot, the upper portion of thepot will always be heated sufficiently to prevent undue cooling of thepot in the rotating action. The drum f is surrounded by a bell-shapedjacket 0, open below, in such manner that there is left annularlybetween the jacket and the drum an intermediate space y for thereception and distribution of the combustion gases, and the'jacket isprovided at its upper edge with a number of small apertures t wherefromthe combustion gases can escape. The drum 7 is provided with a number ofbeating blades or ribs. Hitherto such blades have been made separatelyfrom the drum and then been inserted, but according to the presentinvention they are formed by channelled protrusions u pressed into thewall of drurn'which rise from the inner face of the-druin-in the form ofribs. 1 1n this Way on the one hand fitting in separate ribs is avoidedand on theother hand those. sharp edges are obviated which Were formedin the drums heretofore-and which readily acted as settlement places forthe colouring material and rendered cleaningdiflicult.

The drum f, as stated before, is secured to theiupper end otthe Sl ltiftln sdcll manner as to bereadily exchangeable. 111 this manner diiferentdrums maybe employed in one and the same driving and heating apparatus,in each I case to suit requirements and espe- "cially tosuitthedesiredcolouring material.

" Obviously many -construetional modifications are possible withoutthereby :in any Way" departing' frornthe essence "of the H1- vention.

Iclaim 1- 1." In an apparatus of the Character de- "scribed, a *potmounted to rotate upon anaxis inclined to the horizontal, said pot havmga normally open upper" end, a ]tl(:l(6i$ surrounding the pot and havinga normally open lower end, said, jacket being spaced ii-om the pot-toprovide an intervening combustion space and PIOVlLl ECltQ-EL L DSLUPPBFend with exhaust outlets from said combustion space, a. gas burnerarranged Within the 1 base of the acket and arranged to project 1 itsflames against the bottom of the pot and into said combustion space, andmeans for 1 rotating the pot andyj aeket.

2. In an apparatus of the character described; a-ipot ahavingzan,openupper end rand. a closed botto 1n,- sardipot being mounted to:rotate upon" an axis inclinedi to the horinreans for tilting thesarnebetween oppositely inclined operating and dumping-positions.

Intestirnony whereof I a fiixniy signature.

'WILHELM .Mi'rUELER.

